How to connect a VPN software client to an ezVPN server

Cisco already provides us a reliable VPN software for Windows. You can use the configuration same as the picture showed above.

For all the Linux-based OSs, you have to download the VPNC packaged to connect to an ezVPN server.

I do NOT test on a MAC yet. But I am pretty sure that there is a VPNC software out there for the Macintosh OS.

How to config small Cisco routers as an ezVPN client

Normally, we use routers for a VPN site-to-site or VPN software for an ezVPN client. However, in the case, we do NOT have a public IP address or the router is behind a NAT device, we have to config the router as an ezVPN client.

Unlike the VPN software client, the router must config static routes after its connected to the ezVPN server.

How to config small Cisco routers as an ezVPN server

Although configuring the ezVPN server on a Cisco Firewall device is much easier, you still could use a small Cisco router such as 17xx, 18xx or 26xx series to make it happens.

First, you have to check the router if it supports VPN tunnel or not by using the command
        
       #show version